Measurement and prediction of solid–liquid phase equilibria for diamine + n-heptane, or cyclohexane |
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Authors: | Farida Allal Abdallah Dahmani |
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Affiliation: | Laboratoire de thermodynamique et modélisation, Faculté de chimie, USTHB, BP 32 El-Alia, 16111 Bab-Ezzouar, Alger, Algeria |
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Abstract: | Solid–liquid equilibria (SLE) of N,N,N′,N′-tetramethylethylenediamine, 1,4-dimethylpiperazine and N,N-dimethylaniline+n-heptane or cyclohexane mixtures were measured by a static method. It was found that all systems are simple eutectic systems. Group contribution models have proved fairly successful in predicting SLE, however, the presence of intramolecular effects (ring effect, proximity effect) renders the widely used empirical methods quite inaccurate. However, in this work, the experimental phase diagrams compared satisfactorily with group contribution models (DISQUAC) and also modified UNIFAC (Dortmund version) predictions. |
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Keywords: | Data Solid–liquid equilibria Diamines Model n-Heptane Cyclohexane DISQUAC UNIFAC |
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